The Kong Mong or Kong Mung is a percussive instrument for controlling the rhythm. The gong (Luk Kong) is made of an amalgam of metals such as bronze or brass by beating the circular metal sheet while it is hot in order to make the desired shape, in the same process as the Kong Tee, or by pouring the molten metal into the casting mold, the same process as the Kong Lor.
         The Kong Mong looks like the general Kong but is larger. It is about 1.5 centimeters thick and 50 centimeters in diameter. The central part is a bulging knob which is the position for beating with a stick to produce the sound. The edge of the Kong is folded down, pierced with holes and inserted with cords for hanging on the stand or shoulder beam or for the player to carry. It is beaten with a stick with a soft cloth head. The Kong Mong resembles the Kong Hui or the Kong Chai. It has been used in the Central Region for about 700 years.
         The Kong Mong produces a low resonant sound which can be heard very far away. It is mixed in the Tum Mong ensemble of the Lower Northeastern Region.